The idol of her father's circus, the Takehiro Circus. Sumire is a brave character who always smiles even if she's facing difficulties. She is helping her father's circus, but they're struggling due to a lack of performers and profits.
She travels around the world with the circus, and so cannot go to school and has few friends - her pet pet monkey, Daisy, is her only friend.
- She likes radio exercises (morning routine).
- She likes the circus. She hates the traveling lifestyle.
- According to Hibikino Watcher, her mother died shortly after giving birth to her.